scholarly journals THE SYSTEM OF AUTOMATIC COMBUSTION CONTROL IN GAS-BURNING PLANTS BY CORRECTIVE PARAMETER

2018 ◽  
pp. 66-71
Author(s):  
K.S. Kryzhanovskiy
Keyword(s):  
Automatic Control ◽  
Combustion Process ◽  
Combustion Products ◽  
Electrical Parameters ◽  
Optimal Regime ◽  
Gaseous Fuels ◽  
Automatic Control Systems ◽  
External Conditions ◽  
State Of The Environment

The wide application of gaseous fuels in technology and energy, its high cost, pose the task of improving the quality of its use. The task of automation of technological processes of thermal units heated by natural gas is to increase the safety of operation and the efficiency of their operation. This problem is especially acute in conditions of continuous operation of thermal units, when the state of the environment varies from day to day and from summer to winter. The temperature of the air for combustion, its humidity, the heat of combustion of the gas and the atmospheric pressure fluctuate particularly sharply. In these conditions, when putting into operation the heat unit, it is necessary to set such tinctures that, in the event of unfavorable external conditions, there always was enough oxygen to completelyburn the gas. This can be achieved by increasing the efficiency of the automatic control system of the ratio of the combustion components and the temperature parameters of the unit, according to the optimal regime for each particular technological process. To achieve this goal, we used the results of research into the chemical processes of interaction of combustion products using means for measuring the electrical parameters of a flame based on physical methods of ionization control of the combustion process. The established features and obtained results made it possible to develop a device for monitoring the ionization properties of the combustion process, on their basis, automatic control systems of burners for industrial heat x aggregates. Bibl. 7, Fig. 3.  

scholarly journals Synthesis of Boiler Controllers of the Automatic Power Control System of Power Units

2020 ◽  
Vol 63 (3) ◽  
pp. 223-235
Author(s):  
G. T. Kulakov ◽  
K. I. Artsiomenka
Keyword(s):  
Control System ◽  
Power Control ◽  
Automatic Control ◽  
Control Systems ◽  
Fuel Consumption ◽  
Power Unit ◽  
Power Controller ◽  
Automatic Control Systems ◽  
Automatic Power Control

The article concerns the problem of structure-and-parametric optimization of a cascade automatic control system (CACS) by an example of a boiler power controller and a fuel controller. This CACS, which is a part of automatic control systems for power units, consists of two loops, viz. of an inner loop (which purpose is stabilization of the system) and an outer loop (designed for the adjustment) and, also, of two controller, viz. an outer controller (which is a basic one) provided for stabilization of the output value of the object (in our case, of the actual power unit capacity) and of an inner controller (which is an auxiliary one) provided to regulate fuel consumption. The internal controller builds up the control action with the aid of the boiler load controller of the power unit. As compared to single-loop automatic control systems, the cascade  system provides better quality of transient control due to the higher performance of the internal loop of the system. This advantage is especially noticeable when compensating for disturbances that come through the channel of regulating impact. The article presents two methods of setting, viz. the fuel controller and the boiler power controller. The application of these methods can improve the quality of power control and reduce fuel consumption in transient modes in comparison with the setting of these controllers of a typical power unit automatic power control system. The results of computer simulation of transient processes in CACS for input step surge and internal perturbation confirm the advantages of the methods are presented in this article.

scholarly journals The concept of measurement of calorific value of gaseous fuels

2020 ◽  
Vol 207 ◽  
pp. 01025
Author(s):  
Jaroslaw Markowski ◽  
Pawel Imilkowski ◽  
Marcin Nowacki ◽  
Damian Olejniczak ◽  
Jacek Madry ◽  
...  
Keyword(s):  
Energy Demand ◽  
Fossil Fuels ◽  
Combustion Process ◽  
Calorific Value ◽  
Gaseous Fuels ◽  
Thermal Energy Conversion ◽  
Special Measurement ◽  
Waste Gasification ◽  
The Stability

The issue of measuring and determining the calorific value of fuels is related to thermodynamic analysis of the effects of the combustion process aimed at determining the amount of heat transferred to the environment. Currently, there are several methods for determining the calorific value of fuels and their methodology is related to the type of fuel being analyzed. These methods are quite complicated and require the use of specialized measuring equipment. The energy demand of modern civilization along with the need to protect the natural environment prompts the search for new ways to generate energy directed at sources other than conventional fossil fuels. Technologies related to the use of biogas, synthesis gas obtained in biomass or waste gasification processes are being introduced. The use of these fuels in industrial processes of generating heat and electricity requires caloric stability of the fuel. The caloric stability of the fuel is necessary to ensure the stability of thermal energy conversion processes that translate directly into the set values of generated electricity using electric machines. One way to assess the energy quality of a fuel is to measure its calorific value. There are several methods for determining the calorific value of a fuel, but they all require special measurement conditions. The article presents the author’s concept of a calorimeter dedicated to the analysis of the calorific value of gaseous fuels.

MODERNIZATION OF TUNNEL KILN FOR CERAMIC BRICKS CALCINATION LLC «METEKHIS CERAMICS» (GEORGIA)

2017 ◽  
pp. 67
Author(s):  
A.I. Torchinskij ◽  
A.Yu. Ljashko ◽  
Z. Chichua
Keyword(s):  
Automatic Control ◽  
Control Systems ◽  
Tunnel Kiln ◽  
Engineering Equipment ◽  
Automatic Control Systems ◽  
Advantages And Disadvantages ◽  
Manufactured Products ◽  
Aerodynamic Parameters ◽  
Firing Ceramic

Gas-burning devices of SG Series and the system of automatic control of firing ceramic bricks for the tunnel kiln by production of Gas Institute of NAS of Ukraine were mounted at the enterprise LLC «Metekhis ceramics» (Georgia. The analysis of the design features of this type of furnaces was made by the Bulgarian project. The advantages and disadvantages caused by outdated thermal equipment and the lack of aerodynamic parameters of automatic control systems are also considered. The fundamental scheme of the kiln is designed with a new thermo-heating engineering equipment and automatics for thermal and aerodynamic modes regulation The influence of new heating engineering equipment and automatics is considered for the quality of manufactured products, kiln productivity and natural gas specific consumption. Bibl. 5, Fig. 2

scholarly journals USE OF VISUAL PROGRAMMING LANGUAGE FOR SIMULATION OF DYNAMIC SYSTEMS

2021 ◽  
Vol 295 (2) ◽  
pp. 109-115
Author(s):  
Tetiana ROMANENKO ◽  
◽  
Nataliia RUSINA ◽  
Keyword(s):  
Automatic Control ◽  
Control Systems ◽  
Linear Systems ◽  
Programming Language ◽  
Dynamic Systems ◽  
Control Object ◽  
Visual Programming ◽  
Automatic Control Systems ◽  
Visual Programming Language

The article presents examples of research of typical links of linear systems and construction and study of transient functions, namely: research of influence of parameters of elements of systems of automatic control of its quality. Programs for automatic control are developing rapidly, the main areas of which are related to the optimization of technological processes and robotics. This encourages the introduction into modern production of high-precision digital systems with more extensive use of computer systems. In the simulation process, there is often a need to carefully select and apply real objects to study the quality of automatic control systems. This can be achieved by using a visual programming language for modeling dynamic systems and designing VisSim. The connection of parameters of automatic control systems with indicators of its quality is investigated: by definition of error coefficient; research of influence of a constant time of a forcing link on quality of automatic control systems by the method of compensation of the part in the main inertia of the control object, for the use of the forcing link. As a result, of research graphic dependences of quality of linear systems of automatic control, research of influence of a constant of time of a forcing link on its quality, carrying out identification of the regulator and object of management of systems of automatic control are received. Studies of the process of modeling dynamic systems were visually presented using the visual programming language VisSim. In particular, by creating virtual laboratory stands to study the quality of different modes of automatic control systems in relation to the performance of signal generators and the calculation of the necessary parameters of the study.

scholarly journals SELECTED ASPECTS IN THE ANALYSIS OF THE COMBUSTION PROCESS USING WAVELET TRANSFORM

2020 ◽  
Vol 10 (3) ◽  
pp. 52-55
Author(s):  
Żaklin Grądz
Keyword(s):  
Wavelet Transform ◽  
Discrete Wavelet Transform ◽  
Sampling Rate ◽  
Combustion Process ◽  
Measurement Data ◽  
Combustion Products ◽  
Discrete Wavelet ◽  
Direct Influence ◽  
High Sampling Rate

The complexity of changes occurring in the flame during the combustion process has a direct influence on the quantity and quality of the combustion products. The presented measurement data pertaining to the changes in flame luminosity were recorded using a specialized monitoring system. These signals from the combustion of such fuels as pulverized coal and mazout were recorded with high sampling rate. The paper presented the analysis of changes in flame luminosity for different fuels using continuous and discrete wavelet transform. The main aim of the studies was to determine the scale values, which enable differentiating between the type of combusted fuel. The results of studies were presented in the form of scalograms.

scholarly journals DEVELOPMENT OF STRUCTURAL SCHEMES AND OPERATION ALGORITHMS FOR THE AUTOMATIC CONTROL SYSTEM OF A MULTIFUNCTIONAL ENERGY COMPLEX

2021 ◽  
Vol 445 (1) ◽  
pp. 82-90
Author(s):  
G. Kalimbetov ◽  
A. Toigozhinovа ◽  
W. Wojcik
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Control Systems ◽  
Dynamic Control ◽  
Control Object ◽  
Control Device ◽  
Automatic Control Systems ◽  
Operating Modes ◽  
Quality Of Control

Among the promising automatic control systems, logical-dynamic control systems that change both the structure and parameters of the control device using switches formed on the basis of a certain logical algorithm have proven themselves well. The use of logical algorithms as part of MACS subsystems for complex technical objects makes it possible to increase the static and dynamic accuracy of control due to purposeful qualitative and quantitative changes in the control signal. This approach will give the control system fundamentally new properties that allow to fully take into account the nature and dynamics of the movement of the control object. When developing existing logical control algorithms, the issues of their application for multi-connected and multifunctional objects control were not considered. Common to existing logical algorithms is that when switching the structure and/or changing parameters, only the dynamics of its own subsystem is taken into account, which is unacceptable in the case of multi-connected dynamic object control, since cross-links have a significant impact on the quality of control. Thus, the problem of synthesis of logical algorithms for multi-connected objects control is an actual theoretical and applied problem. Despite the considerable amount of research conducted in this area, the application of logical algorithms for complex multidimensional objects control is not sufficiently considered, and there is no unified design concept for this type of MACS, taking into account the required quality of functioning in various operating modes. In this regard, there is a need to synthesize algorithms for logical multi-connected control that form control signals in order to coordinate the actions of all separate MACS subsystems in accordance with new external conditions and operating modes. The problem under consideration determined the purpose of this work and the research objectives.

scholarly journals REFINEMENT OF THE REDUCED CHARACTERISTICS OF CENTRIFUGAL BLOWERS IN THEIR ANALYTICAL FORM

2018 ◽  
pp. 94-100
Author(s):  
S. I. Perevoschikov
Keyword(s):  
Natural Gas ◽  
Automatic Control ◽  
Control Systems ◽  
Analytical Form ◽  
Technological Processes ◽  
Automatic Control Systems ◽  
Pipe Line

The article describes methods of simplified and refined correction of the reduced characteristics of centrifugal blowers of natural gas in their analytical form. The correction is carried out with the aim to improve the quality of the translation characteristics from the graphics view to the ana-lytic, where they can be used in automatic control systems of technological processes in gas pipe-line systems.

DEVELOPMENT OF A UNIVERSAL AUTOMATIC CONTROL SYSTEM FOR TECHNOLOGICAL PROCESS OF HOLE PROCESSING WITH A MULTI-TOOL

2020 ◽  
Keyword(s):  
Automatic Control ◽  
Transfer Functions ◽  
Stable Operation ◽  
Hydraulic Power ◽  
High Productivity ◽  
Technological Processes ◽  
Automatic Control Systems ◽  
Heavy Loads ◽  
Automatic Systems

The industry serially produces hydraulic power heads, tables designed for drilling, countersinking and boring holes. The disadvantage of these power heads is that they are not universal in terms of the impossibility of rapid changeover from the drilling operation to the reamer. At the same time, two methods of processing holes with multi-blade tools are implemented. The first one is drilling holes in solid metal with a drill, in which the cutting tool experiences heavy loads, leading to premature wear and breakage. The second one is boring of the obtained holes after technological operations of drilling and countersinking, which leads to increased energy costs and labor of operators. The existing fleet of drilling machines, as a rule, is not equipped with automatic control systems of technological processes, allowing to ensure the quality of hole processing at high productivity. The article presents the original universal two-circuit scheme of automatic control of technological processes of drilling and reaming holes. The system controls the technological processes of drilling holes by switching the appropriate taps in the application of hydraulic power heads and improves the quality of processing and tool life. With the help of General transfer functions and according to the Raus - Hurwitz criterion, its stable operation is achieved both during drilling and deployment. The derived mathematical models make it possible to perform calculations to determine the mass-geometric and regime parameters necessary for the design and creation of automatic systems for controlling the modes of operation of hydraulic power heads.

scholarly journals Configuring adaptive PID-controllers of the automatic speed control system of the GTE

2020 ◽  
Vol 8 (6) ◽  
pp. 143-156
Author(s):  
K. E. Chertilin ◽  
V. D. Ivchenko
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Gas Turbine ◽  
Adaptive Systems ◽  
Fuzzy Controller ◽  
Operating Conditions ◽  
Rule Base ◽  
Adaptation Algorithm ◽  
Automatic Control Systems

For non-stationary objects with parameters, which could be changed significantly during operation, using conventional controllers in the form of proportional-integraldifferential regulators may not provide the required quality of the system. Therefore, it is desirable to create an adaptive automatic control system with the structure and parameters of the control regulator that are purposefully changed to ensure the system adaptation, that is based on information about the properties of the object of regulation and external influences, to the changing operating conditions. The problem of designing adaptive systems is one of the most important in control theory and related fields. This is conditioned by two factors: the complexity of solving the problem as a whole and the presence of a large number of technically diverse situations that need to be adapted and optimized. In the paper, an adaptive system for the automatic control of the speed of a gas turbine engine, which includes a magnetic amplifier, a DC motor with a gearbox, a fuel supply valve and a tachogenerator, is developed. For adaptive control execution, three proportional-integral-differential controllers were proposed: "classic", fuzzy and neurofuzzy. The parameters of the "classic" controller were optimized using linear programming methods. The membership functions and the rule base were proposed for the fuzzy controller. An adaptation algorithm was selected for the neuro-fuzzy controller. Three controllers were used for three engine-operating modes: low-gas, cruiser and maximum during the computer simulation of the system. A comparative analysis of the quality of the three regulators was performed and it is based on the obtained transient characteristics. The derived results can be used in the development of automatic control systems for gas turbine engines.

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